选项B的知识点出处

NO.PZ2021101401000011 问题如下 Yuen anRuckey scuss the fferences between the historicsimulation anMonte Carlo simulation, then sign the simulations, making key cisions various steps. ring the process, Yuen expresses a number of concerns: • Concern 3: The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness.Baseon Concern 3, the Factor 1 strategy is most likely to: A.favorerisk-averse investors. B.generate surprises inthe form of negative returns. C.have return ta thline up tightly arouna trenline. B is correct. The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness (relative to the normstribution). The excess kurtosis implies ththese strategies are more likely to generate surprises, meaning extreme returns, wherethe negative skewness suggests those surprises are more likely to negative (thpositive).A is incorrebecause risk-averse investors are more likely to prefer stribution properties supositive skew (higher probability of positive returns) anlower to morate kurtosis (lower probability of extreme negative surprises). The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness.C is incorrebecause the stribution of Factor 1 returns exhibits excess kurtosis annegative skewness. The joint stribution of sureturns is rarely multivariate normal—so, typically the means anvariances of these returns anthe correlations between them are insufficient to scrithe joint return stribution. In other wor, the return ta not line up tightly arouna trenline because of ftails anoutliers. B.generate surprises in the form of negative returns.老师这个surprise这里是表示什么？

NO.PZ2021101401000011问题如下 Yuen anRuckey scuss the fferences between the historicsimulation anMonte Carlo simulation, then sign the simulations, making key cisions various steps. ring the process, Yuen expresses a number of concerns: • Concern 3: The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness.Baseon Concern 3, the Factor 1 strategy is most likely to: A.favorerisk-averse investors.B.generate surprises inthe form of negative returns.C.have return ta thline up tightly arouna trenline. B is correct. The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness (relative to the normstribution). The excess kurtosis implies ththese strategies are more likely to generate surprises, meaning extreme returns, wherethe negative skewness suggests those surprises are more likely to negative (thpositive).A is incorrebecause risk-averse investors are more likely to prefer stribution properties supositive skew (higher probability of positive returns) anlower to morate kurtosis (lower probability of extreme negative surprises). The stribution of Factor 1 returns exhibits excess kurtosis annegative skewness.C is incorrebecause the stribution of Factor 1 returns exhibits excess kurtosis annegative skewness. The joint stribution of sureturns is rarely multivariate normal—so, typically the means anvariances of these returns anthe correlations between them are insufficient to scrithe joint return stribution. In other wor, the return ta not line up tightly arouna trenline because of ftails anoutliers. AC能一下吗

NO.PZ2021101401000011 have return ta thline up tightly arouna trenline.C的这句话是什么意思，解析没看懂，是不是正态和是否line up tightly arouna trenline有什么关系吗